When to refinance your home loan in Australia
The right time to refinance depends on rate movements, your equity position, and lender switching costs. Complete guide with worked examples and break-even analysis.
Refinancing your home loan can save you thousands of dollars a year — but only if you do it at the right time and for the right reasons. Switch too early and break costs may wipe out your savings. Switch too late and you have been overpaying by thousands. This guide walks through every scenario so you know exactly when refinancing makes financial sense.
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What is refinancing and how does it work?
Refinancing means replacing your existing home loan with a new one — either with the same lender (known as a rate switch or internal refinance) or with a different lender (external refinance).
The new lender pays out the existing loan and takes security over the property. Timing depends on approval, documentation, valuation and settlement arrangements; ask both lenders for a specific estimate.
Most Australians refinance for one of three reasons: to get a lower interest rate, to access equity (cash-out refinancing), or to switch from a fixed to a variable loan (or vice versa).
When refinancing saves you money
Compare the same balance and remaining term
A lower rate does not by itself justify refinancing. Compare the same remaining term and repayment type, all switching costs and the intended holding period. A constant $500,000 balance times 0.50 percentage points is $2,500 simple annual interest before fees; amortising-loan savings differ.
The same rate reduction has a larger initial dollar effect on a larger balance. Use the refinance engine to account for repayment and balance changes, then include actual switching costs.
Illustration: retain a $500,000 loan and 25-year remaining term. A constant 6.39% rate gives $3,341.75 monthly; 5.89% gives $3,187.97. The $153.78 monthly difference gives $46,133.57 over 300 payments before fees, or $44,133.57 after $2,000 upfront switching costs. Simple cash-flow break-even rounds up to 14 months. No offset, cashback, LMI, break costs or future rate changes are included.
The refinance break-even calculator
To determine whether refinancing is worth it, calculate your break-even period:
- Total switching costs (discharge fee + application fee + valuation fee) ÷ monthly saving = months to break even
- Example: $900 in switching costs ÷ $125 per month saving = 7.2 months to break even
- A holding period beyond simple break-even is only one factor; compare total interest, features, risks and actual fees before deciding
Use Calcy's refinance calculator to model break-even and savings under your entered assumptions. Rates, fees and future balances can change the result.
Fixed rate expiry — the natural refinance window
At fixed expiry, check the proposed revert rate, fees and alternatives. Break costs relate to leaving during a fixed period; discharge and other charges can still apply after expiry.
When NOT to refinance
You are still in a fixed term with high break costs
Leaving a fixed period can incur a significant break cost. Obtain a written quote rather than relying on a generic dollar range.
Your LVR is above 80%
If your property value has fallen or your loan balance is high relative to the property value, refinancing may trigger LMI costs. A new lender will assess the property at current market value. If the LVR exceeds 80%, you may need to pay LMI again.
You plan to sell within the break-even period
If you expect to sell the property within 12 months, the switching costs may not be recouped through interest savings. Run the break-even calculation first.
Your credit score has dropped
Lenders run a credit check during refinancing. If your credit score has dropped since your original loan, you may not qualify for the best rates — or may be declined entirely.
Refinancing to access equity (cash-out refinancing)
Cash-out refinancing means increasing your loan balance to access the equity you have built in your property. This is common for:
- Renovations and home improvements
- Debt consolidation (paying off higher-interest debts)
- Purchasing an investment property
- Funding education or medical expenses
Illustration: an $800,000 valuation less a $450,000 loan gives $350,000 equity. Under an assumed 80% LVR ceiling, a $640,000 loan leaves $190,000 before fees after repaying the old balance. This is a security calculation, not a cash entitlement or serviceability approval; lender conditions and any LMI must be confirmed.
Lenders scrutinise cash-out refinancing more closely than rate-and-term refinancing. You will need to demonstrate the purpose of the funds and show you can service the higher loan amount.
The four signs it is time to refinance
Here is a practical checklist to evaluate whether now is the right time for you:
1. Your lender has not passed on RBA rate cuts
A cash-rate change does not determine the best mortgage for you. Ask your lender for a current quote, compare alternatives including fees and features, and calculate switching costs before deciding.
2. You have built equity since purchasing
Loan repayments or a higher lender valuation may reduce LVR. Ask for current product quotes and confirmation of any LMI requirement; lower rates or a waiver are not automatic.
3. Your fixed rate is about to expire
Before a fixed term ends, ask about the revert rate, discharge timing, any rate-lock fee and the conditions of a proposed new loan. Do not assume a rate lock is available or that leaving early avoids break costs.
4. You want to consolidate higher-interest debts
Debt consolidation can reduce the rate while increasing total interest if short-term debt is extended over decades. It also secures previously unsecured debt against the home. Compare total cost and repayment time, not just the monthly reduction.
Hidden costs of refinancing
Refinancing is not free. These are the typical costs you need to factor into your break-even calculation:
| Cost item | Amount to enter | What to check |
|---|---|---|
| Discharge | Existing lender quote | Payout and discharge charges |
| Application / valuation / settlement | New lender quote | Which fees are waived or payable |
| LMI | New lender quote if required | Valuation, security and any approved waiver; ask about an old-policy refund |
| Fixed break cost | Current written quote | Quote validity and proposed settlement date |
Total switching costs depend on written discharge, application, valuation, settlement, break-cost and LMI quotes. Compare the same remaining loan term and calculate when savings recover these costs.
Step-by-step refinance process
Follow these steps to refinance with minimal friction:
- Check your current loan details — rate, balance, fixed term expiry, and break costs
- Get your property valued — either online or through a lender valuation
- Compare at least 3 lenders — look beyond the headline rate to fees and features
- Call your existing lender's retention team — ask for a rate match before switching
- Submit your application — provide payslips, tax returns, and bank statements
- Allow time for approval, valuation and settlement; obtain a lender-specific estimate
- Settle — the new lender pays out the old loan and you start the new repayments
If your existing lender offers a different rate or product, confirm whether fees, offset, redraw and other conditions change. Compare the written terms with the alternative offer.
Key takeaways
- At a constant $500,000 balance, 0.50 percentage points is $2,500 of simple annual interest before fees. Actual amortising-loan savings depend on balances, timing, term and switching costs.
- Calculate your break-even period: switching costs divided by monthly savings
- Never refinance a fixed rate loan without getting a break cost quote first
- At fixed expiry, review the revert rate and any discharge or switching charges; absence of a break cost does not mean a fee-free refinance.
- Cash-out refinancing lets you access equity for renovations, debt consolidation, or investments
- Ask your existing lender for a written competing offer before switching; no rate reduction is guaranteed.
Sources
Keep switching fees and the first cost-recovery point visible in the Refinance Break-Even Planner, then compare offers in the four-loan comparison workbook.
Frequently asked questions
How often should I refinance my home loan?
Review when your loan terms or circumstances change, and when comparing a specific alternative offer. Repeated refinancing is not automatically beneficial; each switch needs a fresh cost and eligibility assessment.
Does refinancing affect my credit score?
A formal credit application may create a credit-file enquiry. Multiple applications can affect assessment. Check likely eligibility and total switching costs before applying; savings are not guaranteed to outweigh other effects.
Can I refinance if I have less than 20% equity?
You may need a new LMI premium with less than 20% equity. Any waiver is lender-specific; obtain a written quote and ask your existing lender about a possible partial refund.
How long does refinancing take?
Refinance timing depends on approval, valuation, documentation and both lenders. Ask for a transaction-specific estimate rather than relying on a fixed timeline.
What documents do I need to refinance?
Ask the new lender for its document checklist. It may request payslips, tax returns or business records, bank statements and current loan statements. Required periods depend on the lender and your circumstances.
Can I refinance to consolidate debt?
Yes. Debt consolidation refinancing increases your loan balance to pay off credit cards, personal loans, or car loans. This can reduce your overall interest cost but only works if you do not accumulate new debt on the paid-off cards.
General information and estimates, not personal financial advice. Check assumptions and official sources before making decisions.